CREATE TABLE subject(
	id BIGSERIAL PRIMARY KEY,
	name VARCHAR(255) NOT NULL,
	direction VARCHAR(255) NOT NULL
);

CREATE TABLE teacher(
	id BIGSERIAL PRIMARY KEY,
	name VARCHAR(255) NOT NULL
);


CREATE TABLE student(
	id BIGSERIAL PRIMARY KEY,
	name VARCHAR(255) NOT NULL,
	familyPos bool NOT NULL,
	domitory bool NOT NULL
);

CREATE TABLE studentTransition(
	id BIGSERIAL PRIMARY KEY,
	studentid BIGINT REFERENCES student (id) NOT NULL,
	operation VARCHAR(255) NOT NULL,
	date timestamp
);

CREATE TABLE statement(
	id BIGSERIAL PRIMARY KEY,
	subjectid BIGINT REFERENCES subject (id) NOT NULL,
	teacherid BIGINT REFERENCES teacher (id) NOT NULL,
	date timestamp
);

CREATE TABLE marks(
	statementid BIGINT REFERENCES statement (id) NOT NULL,
	studentid BIGINT REFERENCES student (id) NOT NULL,
	mark integer NOT NULL 
);